async Task AccessTheWebAsync(CancellationToken ct)
{
try
{
HttpClient client = new HttpClient();
List <string> urlList = UrlBuilder.SetUpURLList(Convert.ToInt32((this.ViewModel.EndDate - this.ViewModel.StartDate).TotalDays), ViewModel.Table, ViewModel.CurrencyCode, ViewModel.StartDate);
List <Task <List <RateModel> > > downloadTasks = (from url in urlList select WebServiceConsumer.ProcessURL(url, client, ct, () => this.ViewModel.SetErrorText("Error"))).ToList();
this.ViewModel.ShowProgressBars();
this.ViewModel.SetProgressInterval(Convert.ToInt32(Math.Ceiling(100D / downloadTasks.Count())));
while (downloadTasks.Count > 0)
{
Task <List <RateModel> > firstFinishedTask = await Task.WhenAny(downloadTasks);
downloadTasks.Remove(firstFinishedTask);
await firstFinishedTask.ContinueWith((t) =>
{
var res = t.Result;
this.ViewModel.CurrenciesSet(Randomizer.RandomArrayEntries(res, 10));
this.ViewModel.UpdateProgress();
}, TaskScheduler.FromCurrentSynchronizationContext());
}
this.ViewModel.HideProgress();
}
catch (AggregateException aggex)
{
this.ViewModel.HideProgress();
this.ViewModel.SetErrorText("Connection can not be established");
}
catch (Exception ex)
{
this.ViewModel.HideProgress();
this.ViewModel.SetErrorText("Connection can not be established");
}
}